Radial multi-membrane bag reverse osmosis membrane

Abstract

The application discloses a radial multi-membrane bag reverse osmosis membrane, which comprises a membrane shell assembly (1) located at the outermost layer, a central water inlet pipe (2) located in the membrane shell assembly (1), a plurality of reverse osmosis membrane bags (3) uniformly distributed in the periphery of the central water inlet pipe (2) in the circumferential direction, a concentrated water grid (4) located in the periphery of the central water inlet pipe (2) in a radial manner, and a protective net cover (5), the outer contour of each reverse osmosis membrane bag (3) is in the shape of a sector, is arranged between the concentrated water grid (4) and the protective net cover (5), one end of the central water inlet pipe (2) is opened as a raw water inlet (21), the side wall is provided with a plurality of water passing through holes (20), a pure water collecting pipe (11) is arranged on the membrane shell assembly (1), pure water channels in each reverse osmosis membrane bag (3) are connected to the pure water collecting pipe (11), and a concentrated water collecting pipe (12) is arranged on the membrane shell assembly (1) and connected to concentrated water channels between each reverse osmosis membrane bag (3) and the membrane shell assembly (1).

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of water purification equipment and pure water equipment components, specifically to a kind of reverse osmosis membrane. BACKGROUND

[0002] Reverse osmosis membrane is a commonly used component in water purification equipment and pure water equipment. The existing reverse osmosis membrane needs to be placed in a membrane shell. In order to save space and use installation conveniently, the traditional single reverse osmosis membrane component is wrapped in a spiral shape along the center water production pipe, and finally forms a multi-layer tightly wound structure membrane bag layer, that is, the entire reverse osmosis membrane has 1-3 membrane bag rotation winding rolls, and the filtering performance is general. Because the longer the spiral line diameter of the membrane sheet is, the greater the resistance near the center pipe is, and the more difficult the water production is. This kind of traditional spiral reverse osmosis membrane component has the problems of long flow channel, large resistance, slow flow rate, small water production, low membrane utilization rate and the like. SUMMARY

[0003] The technical problem to be solved by the present application is to overcome the shortcomings of the prior art, and to provide a radial multi-membrane bag reverse osmosis membrane with short flow channel, small resistance, fast flow rate, large water production and high membrane utilization rate.

[0004] The technical solution adopted by the present application is: the present application comprises a membrane shell assembly located at the outermost layer, a center water inlet pipe located inside the membrane shell assembly, a plurality of reverse osmosis membrane bags uniformly distributed around the center water inlet pipe, a concentrated water grid located radially outside the center water inlet pipe, and a protective net cover. Each of the reverse osmosis membrane bags is arranged between the concentrated water grid and the protective net cover, and the outer contour of each of the reverse osmosis membrane bags is in the shape of a sector. One end of the center water inlet pipe is opened as a raw water inlet, and the side wall is provided with a plurality of water passing holes. The membrane shell assembly is provided with a pure water collecting pipe, and the pure water channels in each of the reverse osmosis membrane bags are connected to the pure water collecting pipe. The membrane shell assembly is provided with a concentrated water collecting pipe connected to the concentrated water channels between each of the reverse osmosis membrane bags and the membrane shell assembly. Raw water enters the center water inlet pipe through the raw water inlet, and enters the concentrated water channels from the water passing holes. The water is distributed around each of the reverse osmosis membrane bags under the action of water pressure, and penetrates into each of the reverse osmosis membrane bags. Pure water is produced by reverse osmosis filtration, and the pure water flows out through the pure water collecting pipe. The salt-containing insoluble solids and heavy metal impurities are filtered and intercepted in the concentrated water channels outside the reverse osmosis membrane bags, and are discharged from the concentrated water collecting pipe.

[0005] The radial multi-membrane bag reverse osmosis membrane further comprises a special-shaped sealing ring arranged at the upper and lower ends inside the membrane shell assembly to seal and isolate the reverse osmosis membrane bags, so as to separate the pure water channels and the concentrated water channels without water leakage.

[0006] The reverse osmosis membrane bag comprises a peripheral reverse osmosis membrane sheet and a pure water guide cloth wrapped inside the reverse osmosis membrane sheet; the reverse osmosis membrane sheet is sealed by glue to form a membrane bag, which is then folded into a fan-shaped membrane bag; the upper and lower ends of the membrane bag are processed by glue filling and cutting to separate the pure water channel and the concentrated water channel; the gaps between the membrane bags are filled with epoxy glue to isolate the concentrated water outside the membrane bag wall.

[0007] The concentrated water grid comprises a net-shaped annular cylinder in the center, a plurality of net-shaped membrane bag isolation fins and net-shaped membrane bag positioning fins fixedly connected to the annular cylinder in a radial manner; the membrane bag isolation fins and the membrane bag positioning fins are uniformly arranged along the circumference of the annular cylinder; the radial size of the membrane bag isolation fin is greater than that of the membrane bag positioning fin; the reverse osmosis membrane bag is sleeved on the membrane bag positioning fin through a folded gap; the membrane bag isolation fins on both sides of each membrane bag positioning fin separate it from the adjacent membrane bag positioning fins.

[0008] The concentrated water grid is made of nylon; the membrane bag isolation fins and the membrane bag positioning fins are fixed to the annular cylinder by ultrasonic welding.

[0009] The inner diameter of the protective net cover is adapted to the radial size of the outermost end of the membrane bag isolation fin to limit the reverse osmosis membrane bag.

[0010] The protective net cover is made of nylon or glass fiber and has a thickness of 1.0-2.0 mm.

[0011] The pure water collecting pipe and the concentrated water collecting pipe are each provided with two pipes arranged on the upper and lower parts of the membrane shell assembly.

[0012] The membrane shell assembly is made of glass fiber reinforced plastic or stainless steel.

[0013] The other end of the central water inlet pipe is sealed by a plug; the central water inlet pipe is made of ABS.

[0014] The beneficial effects of the present application are: due to the present application comprising a membrane shell assembly located at the outermost layer, a central water inlet pipe located in the membrane shell assembly, a plurality of reverse osmosis membrane bags uniformly distributed in the circumferential direction on the periphery of the central water inlet pipe, a concentrated water grid radially located on the periphery of the central water inlet pipe, and a protective net cover, each of the reverse osmosis membrane bags is arranged between the concentrated water grid and the protective net cover, the outer contour of each of the reverse osmosis membrane bags is in the shape of a sector, one end of the central water inlet pipe is opened as a raw water inlet, the side wall is provided with a plurality of water passing through holes, the membrane shell assembly is provided with a pure water collecting pipe, the pure water channels in each of the reverse osmosis membrane bags are connected to the pure water collecting pipe, the membrane shell assembly is provided with a concentrated water collecting pipe connected to the concentrated water channels between each of the reverse osmosis membrane bags and the membrane shell assembly; the raw water enters the central water inlet pipe through the raw water inlet, and enters the concentrated water channels from the water passing through holes, is distributed around each of the reverse osmosis membrane bags, and penetrates into each of the reverse osmosis membrane bags under the action of water pressure to produce pure water through reverse osmosis filtration, the pure water flows out through the pure water collecting pipe, the salt-containing insoluble solids and heavy metal impurities are filtered and intercepted in the concentrated water channels outside each of the reverse osmosis membrane bags, and are discharged from the concentrated water collecting pipe; the present application overcomes the defects and deficiencies of the prior art, discards the traditional spiral reverse osmosis membrane structure and technical idea of multi-layer winding and rolling, and proposes a different technical route, that is, a plurality of independent reverse osmosis membrane bags are used and are uniformly distributed in the circumferential direction on the periphery of the central water inlet pipe, so that each of the reverse osmosis membrane bags can evenly receive raw water, pure water and concentrated water, avoiding the disadvantages of the traditional spiral reverse osmosis membrane component that the longer the spiral line diameter of the membrane sheet is, the closer to the central pipe it is, and the greater the resistance is, and the more difficult the water production is, that is, the traditional spiral multi-layer stacked membrane bag is changed into a plurality of membrane bags uniformly distributed in the circumferential direction and radially distributed, so that the water pressure is uniform, and the disadvantages of the traditional spiral reverse osmosis membrane component, such as long flow channel, large resistance, slow flow rate, small water production, and low membrane utilization rate, are avoided; therefore, the radial multi-membrane bag reverse osmosis membrane of the present application has the advantages of short flow channel, small resistance, fast flow rate, large water production, and high membrane utilization rate, and is a radial multi-membrane bag reverse osmosis membrane. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a schematic diagram of a cross-sectional structure of the radial multi-membrane bag reverse osmosis membrane of the embodiment of the present application;

[0016] Figure 2 is a schematic diagram of a longitudinal cross-sectional structure and water flow direction of the radial multi-membrane bag reverse osmosis membrane of the embodiment of the present application;

[0017] Figure 3 is a schematic diagram of a cross-sectional structure and water flow distribution of the radial multi-membrane bag reverse osmosis membrane of the embodiment of the present application when raw water just starts to flow into the central water inlet pipe.

[0018] Figure 4This is a schematic diagram of the cross-sectional structure and water flow distribution of the radial multi-membrane bag reverse osmosis membrane in an embodiment of the present invention when concentrated water is produced after the raw water flows out of the central inlet pipe.

[0019] Figure 5 This is a schematic diagram of the cross-sectional structure and pure water distribution of the radial multi-membrane bag reverse osmosis membrane in an embodiment of the present invention when producing pure water.

[0020] Figure 6 This is a schematic diagram of the cross-sectional structure of the reverse osmosis membrane bag according to an embodiment of the present invention;

[0021] Figure 7 This is a schematic diagram of the cross-sectional structure of the concentrate grid according to an embodiment of the present invention;

[0022] Figure 8 This is a schematic diagram of the cross-sectional structure of the protective mesh cover according to an embodiment of the present invention;

[0023] Figure 9 This is a schematic diagram of the cross-sectional view of the sealing structure at the lower end of the reverse osmosis membrane bag according to an embodiment of the present invention. Detailed Implementation

[0024] like Figures 1-9 As shown, the reverse osmosis membrane component in this embodiment is a radial multi-bag reverse osmosis membrane, including an outermost membrane housing assembly 1, a central inlet pipe 2 located within the membrane housing assembly 1, several reverse osmosis membrane bags 3 evenly distributed circumferentially around the central inlet pipe 2, a radially arranged concentrate grid 4 located around the central inlet pipe 2, and a protective mesh cover 5. Each reverse osmosis membrane bag 3 is arranged between the concentrate grid 4 and the protective mesh cover 5, and the outer contour of each reverse osmosis membrane bag 3 is fan-shaped, that is, the fan-shaped reverse osmosis membrane bags 3 are arranged in a circumferential array. One end of the central inlet pipe 2 is open as a raw water inlet 21, and several water passage holes 20 are provided on the side wall. A pure water collection device is provided on the membrane housing assembly 1. The pure water channels in each of the reverse osmosis membrane bags 3 are all connected to the pure water collection pipe 11. The membrane housing assembly 1 is provided with a concentrate collection pipe 12, which leads to the concentrate channel between each of the reverse osmosis membrane bags 3 and the membrane housing assembly 1. Raw water enters the central inlet pipe 2 through the raw water inlet 21 and enters the concentrate channel through the water passage 20, distributing around each of the reverse osmosis membrane bags 3. Under the action of water pressure, water permeates into each of the reverse osmosis membrane bags 3, and pure water is produced by reverse osmosis filtration. The pure water flows out through the pure water collection pipe 11. Salt-containing insoluble solids and heavy metal impurities are filtered and intercepted in the concentrate channel outside the reverse osmosis membrane bags 3 and discharged from the concentrate collection pipe 12.

[0025] Further, the radial multi-membrane bag reverse osmosis membrane further comprises a special-shaped sealing ring 6 arranged at the upper and lower ends inside the membrane shell assembly 1 respectively, so as to seal and isolate the reverse osmosis membrane bag 3, and realize separation of the pure water channel and the concentrated water channel without water leakage.

[0026] Specifically, the reverse osmosis membrane bag 3 comprises a peripheral reverse osmosis membrane sheet 31 and a pure water guide cloth 32 wrapped inside the reverse osmosis membrane sheet 31; the reverse osmosis membrane sheet 31 is sealed by glue to form a membrane bag, and then is folded into a fan-shaped membrane bag; the upper and lower ends of the membrane bag are processed by glue filling and glue cutting, so as to separate the pure water channel and the concentrated water channel; the gap between the membrane bags is filled with epoxy glue 7 (as shown in the figure), so that the concentrated water is isolated from the outer wall of the membrane bag, and the concentrated water is prevented from entering the pure water channel. Figure 9

[0027] The concentrated water grid 4 comprises a net ring-shaped cylinder 40 located at the center, a plurality of net membrane bag isolation fins 41 arranged in a radial manner and fixedly connected to the ring-shaped cylinder 40 at one end, and net membrane bag positioning fins 42; the membrane bag isolation fins 41 and the membrane bag positioning fins 42 are uniformly arranged along the circumference of the ring-shaped cylinder 40; the radial dimension of the membrane bag isolation fin 41 is greater than that of the membrane bag positioning fin 42; the reverse osmosis membrane bag 3 is sleeved on the membrane bag positioning fin 42 through the folding gap, so as to facilitate installation and positioning; the membrane bag isolation fin 41 is arranged on both sides of each membrane bag positioning fin 42 to separate it from the adjacent membrane bag positioning fin 42, so that each reverse osmosis membrane bag 3 obtains uniform water and good working consistency. In the embodiment, the concentrated water grid 4 is made of nylon (PA), which is water-permeable and corrosion-resistant; the membrane bag isolation fin 41 and the membrane bag positioning fin 42 are fixed to the ring-shaped cylinder 40 by ultrasonic welding.

[0028] The inner diameter of the protective net cover 5 is matched with the radial dimension of the outermost end of the membrane bag isolation fin 41, so as to limit each reverse osmosis membrane bag 3, that is, the protective net cover 5 serves as a columnar cover to cover the concentrated water grid 4, so as to prevent each reverse osmosis membrane bag 3 connected to the concentrated water grid 4 from moving in the radial direction, and to bind each reverse osmosis membrane bag 3 together to form a columnar assembly, so as to further enhance the uniformity and working consistency of each reverse osmosis membrane bag 3, and to facilitate installation, and to play a role in fixation, reinforcement and protection. In the embodiment, the protective net cover 5 is made of nylon, which is water-permeable and corrosion-resistant; of course, it can also be made of glass fiber, and the thickness is 1.5 mm, and the thickness range can be 1.0-2.0 mm.

[0029] ​The pure water collecting pipe 11 and the concentrated water collecting pipe 12 are each provided with two, which are arranged on the upper and lower parts of the membrane housing assembly 1, so that the flow channel is shorter, the resistance is smaller, the flow rate is faster, and the water production is larger.

[0030] The working process and principle of the application are briefly described as follows: a plurality of reverse osmosis membrane bags are folded and distributed in a radial manner around the central water inlet pipe, which is different from the traditional spiral membrane bag, the inner end of the membrane bag is not fixed on the central water inlet pipe, forming a cylinder composed of a plurality of membrane bags folded and distributed in a radial manner, the plurality of membrane bags are fixed into a cylindrical shape by a protective net cover, water diffuses from the central water inlet pipe to the periphery, and pure water is generated by the water permeating into each membrane bag through the pressure difference, the water resistance is small, and the flux is large during work; the pure water collected from the membrane bag through reverse osmosis is collected to the pure water collecting pipe at both ends of the membrane element through the pure water channel, and then discharged; the outside of the membrane bag and the membrane shell form a concentrated water channel, and the concentrated water is discharged from the concentrated water collecting pipe at both ends; the two end parts of the membrane shell are realized by the glue pouring and cutting process to separate the pure water channel and the concentrated water channel.

[0031] The application overcomes the defects and deficiencies of the prior art, discards the traditional spiral reverse osmosis membrane structure and technical idea of multi-layer winding and rolling, and proposes a different technical route, that is, a plurality of independent reverse osmosis membrane bags are distributed in a radial manner around the central water inlet pipe, so that each reverse osmosis membrane bag can evenly receive raw water, pure water and concentrated water, avoiding the disadvantages of the traditional spiral reverse osmosis membrane part that the longer the spiral line diameter of the membrane sheet is, the closer it is to the central pipe, the greater the resistance is, and the more difficult the water production is, that is, the traditional spiral multi-layer stacked membrane bag is changed into a radial multi-membrane bag, so that the water pressure is uniform, and the disadvantages of the traditional reverse osmosis membrane part that the flow channel is long, the resistance is large, the flow rate is slow, the water production is small, and the membrane sheet utilization rate is low are avoided; therefore, the radial multi-membrane bag reverse osmosis membrane of the application has the advantages of short flow channel, small resistance, fast flow rate, large water production and high membrane sheet utilization rate, and is a radial multi-membrane bag reverse osmosis membrane.

[0032] The application can be widely applied in the field of water purification.

Claims

1. A radial multi-membrane bag reverse osmosis membrane, characterized in that: The application relates to a radial multi-membrane-bag reverse osmosis membrane, which comprises a membrane shell assembly (1) located at the outermost layer, a central water inlet pipe (2) located in the membrane shell assembly (1), a plurality of reverse osmosis membrane bags (3) uniformly distributed in the periphery of the central water inlet pipe (2), a concentrated water grid (4) radially located in the periphery of the central water inlet pipe (2), and a protective net cover (5), each reverse osmosis membrane bag (3) is arranged between the concentrated water grid (4) and the protective net cover (5), the outer contour of each reverse osmosis membrane bag (3) is in the shape of a sector, the concentrated water grid (4) comprises a net ring cylinder (40) located at the center, a plurality of net membrane bag isolation fins (41) and net membrane bag positioning fins (42) radially arranged and fixedly connected to the ring cylinder (40), the membrane bag isolation fins (41) and the membrane bag positioning fins (42) are uniformly arranged along the periphery of the ring cylinder (40), the radial dimension of the membrane bag isolation fin (41) is larger than that of the membrane bag positioning fin (42), the reverse osmosis membrane bag (3) is sleeved on the membrane bag positioning fin (42) through a folded gap, the membrane bag isolation fin (41) is arranged on both sides of each membrane bag positioning fin (42) to separate the membrane bag positioning fin (42) from the adjacent membrane bag positioning fin (42), one end of the central water inlet pipe (2) is provided with an original water inlet (21) as an original water inlet, and a plurality of water passing through holes (20) are arranged on the side wall, a pure water collecting pipe (11) is arranged on the membrane shell assembly (1), and the pure water channel in each reverse osmosis membrane bag (3) is connected to the pure water collecting pipe (11), a concentrated water collecting pipe (12) is arranged on the membrane shell assembly (1) and connected to the concentrated water channel between each reverse osmosis membrane bag (3) and the membrane shell assembly (1), the pure water collecting pipe (11) and the concentrated water collecting pipe (12) are arranged in two groups, respectively arranged on the upper and lower parts of the membrane shell assembly (1); original water enters the central water inlet pipe (2) through the original water inlet (21) and enters the concentrated water channel from the water passing through holes (20), is distributed around each reverse osmosis membrane bag (3), and penetrates into each reverse osmosis membrane bag (3) under the action of water pressure, generates pure water through reverse osmosis filtration, the pure water flows out through the pure water collecting pipe (11), and the salt-containing insoluble solid and heavy metal impurities are filtered and intercepted on the concentrated water channel outside each reverse osmosis membrane bag (3) and discharged from the concentrated water collecting pipe (12).

2. The radial multi-membrane-bag reverse osmosis membrane of claim 1, wherein: The radial multi-membrane-bag reverse osmosis membrane further comprises special-shaped sealing rings (6) arranged at the upper and lower ends in the interior of the membrane shell assembly (1) to seal and separate the reverse osmosis membrane bags (3), so that the pure water channel and the concentrated water channel are separated and water is not mixed.

3. The radial multi-membrane RO bag membrane of claim 1, wherein: The reverse osmosis membrane bag (3) comprises a peripheral reverse osmosis membrane sheet (31) and a pure water guide cloth (32) wrapped inside the reverse osmosis membrane sheet (31); the reverse osmosis membrane sheet (31) is sealed by glue to form a membrane bag, which is then folded into a fan-shaped membrane bag; the upper and lower ends of the membrane bag are processed by glue filling and cutting to separate the pure water channel from the concentrated water channel; the gaps between the membrane bags are filled with epoxy glue (7) to isolate the concentrated water outside the membrane bag wall.

4. The radial multi-membrane RO bag membrane of claim 1, wherein: The concentrated water grid (4) is made of nylon, and the membrane bag isolation fins (41) and the membrane bag positioning fins (42) are fixed to the annular cylinder (40) by ultrasonic welding.

5. The radial multi-membrane RO bag reverse osmosis membrane according to claim 1, characterized in that: The inner diameter of the protective net cover (5) is adapted to the radial size of the outermost end of the membrane bag isolation fins (41) to limit the reverse osmosis membrane bags (3).

6. The radial multi-membrane RO membrane according to claim 1 or 5, wherein: The protective net cover (5) is made of nylon or glass fiber with a thickness of 1.0-2.0 mm.

7. The radial multi-membrane roll reverse osmosis membrane of claim 1, wherein: The membrane shell assembly (1) is made of glass fiber reinforced plastic or stainless steel.

8. The radial multi-membrane-bag reverse osmosis membrane of claim 1, wherein: The other end of the central water inlet pipe (2) is sealed by a plug (22); the central water inlet pipe (2) is made of ABS.

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